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Volume 18 Supplement 2

Sepsis 2014

  • Poster presentation
  • Open Access

Alpha lipoic acid attenuates oxidative stress-induced damage macromolecules in the brain of rats with sepsis-associated encephalopathy

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Critical Care201418 (Suppl 2) :P71

  • Published:


  • Nitrite
  • Protein Carbonylation
  • Lipoic Acid
  • Myeloperoxidase Activity
  • Cecal Ligation


Pathophysiological mechanisms of sepsis-associated encephalopathy involve oxidative stress. This imbalance between the pro-oxidant and antioxidant causes damage to macromolecules such as lipids and proteins, thus the employment of antioxidants becomes an attractive proposition. Alpha lipoic acid (LA), a potent antioxidant, is able to cross the blood-brain barrier, and is an important cofactor in enzymatic and cellular energy metabolism. We aimed to determine the use of AL in oxidative damage and neutrophil infiltration in rat brain 12 and 24 hours after induction of sepsis model by cecal ligation and puncture (CLP).


Male Wistar rats (250 to 350 g) were subjected to CLP model, with sham control. Groups were divided into sham + saline, sham + AL, CLP + saline and CLP + AL (200 mg/kg orally with single administration after CLP), n = 10. At 12 and 24 hours, rats were euthanized, the hippocampus, striatum, cerebellum, cortex and prefrontal cortex removed, lipid peroxidation assessed by TBARS, damage to proteins by protein carbonylation, myeloperoxidase activity (MPO) and the formation of nitrite and nitrate. Data were analyzed by ANOVA with post hoc Tukey test and log-rank test with P < 0.05.


In 12 hours compared with the CLP group, the CLP + AL group showed a reduction in lipid peroxidation in the striatum, in the protein carbonylation in the cortex and hippocampus, in the MPO activity in the striatum and hippocampus, and decreased formation of nitrite and nitrate in the hippocampus and cortex.


While differences were not observed in 24 hours, TBARS found protein carbonylation in a reduction of damage to the CLP + AL group over the cerebellum, MPO in the striatum, hippocampus and prefrontal, and hippocampus, cerebellum, and prefrontal to nitrite/nitrate. AL may be an important therapeutic target in reducing neurologic complications in animal models of sepsis.



Financial support from Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Universidade do Sul de Santa Catarina (UNISUL).

Authors’ Affiliations

Laboratório de Fisiopatologia Clínica e Experimental (LAFICEXP), Programa de Pós, Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina (UNISUL), Tubarão, SC, Brazil


© Danielski et al.; licensee BioMed Central Ltd. 2014

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver ( applies to the data made available in this article, unless otherwise stated.